JPH068604Y2 - Liquid developing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid developing device used for a recording device such as an electrostatic plotter having a developing device for developing and fixing on electrostatic recording paper with liquid toner.

2. Description of the Related Art Conventionally, in this type of apparatus, an electrostatic recording head 2 that forms a latent image on a roll-shaped electrostatic recording paper 1 as shown in FIG. 4, and a latent image is formed by the electrostatic recording head 2. The electrostatic recording paper 1 is developed with liquid toner, and the developing device 3 for removing the residual toner to fix the electrostatic recording paper 1, a pair of driving rollers 4 for conveying the electrostatic recording paper 1 and a pinch roller 5. ing. Further, as shown in FIG. 5, the developing device 3 has three rows of liquid toner circulating grooves 6 along the front side paper width direction of the developing device 3 and two rows of residual liquid toner circulating grooves 6 adjacent to the liquid toner circulating grooves 6. A fixing groove 7 for sucking the toner is formed. Moreover, each of the grooves 6 and 7 is formed to have a substantially rectangular cross section.

In the liquid developing apparatus having such a configuration, when the electrostatic recording sheet 1 is started to be conveyed by the driving roller 4 and the pinch roller 5, the electrostatic recording head 2 is brought into contact with the electrostatic recording head 2 to pass therethrough. A latent image is formed on the electrostatic recording paper 1 by means of 2 and is further developed by the liquid toner in the liquid toner circulation groove 6 when passing over the developing device 3 in a pressure contact state, and at the same time the residual toner is caused by the fixing groove 7. Is sucked and fixed, so that a stable image is output on the electrostatic recording paper 1.
After that, the electrostatic recording paper 1 is cut into a predetermined size by a cutting device (not shown) and is discharged onto the tray.

However, according to such a configuration, since the flow rate of the liquid toner supplied from the liquid toner circulation groove 6 of the developing device 3 is constant, the problem that the developing efficiency cannot be increased and the electrostatic discharge There has been a problem that the surface of the developing device 3 is easily worn due to the contact between the recording paper 1 and the developing device 3.

The above problem occurs for the following reasons. That is, firstly, in the liquid developing device, the size of the developing device 3 is limited,
Secondly, it is not possible to make the shape large, and secondly, when the liquid toner is supplied to the developing device 3, the inner diameter of the inflow joint (not shown) is narrow and the inflow amount is restricted, so that the developing efficiency is improved. Because I couldn't. The latter problem is that the liquid toner groove 6 and the fixing groove 7 are formed in a substantially rectangular cross-section, so that the electrostatic recording paper 1 is worn by coming into contact with the corners of the grooves. It's easy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid developing device capable of improving the developing efficiency by changing the shape of the developing device and having improved abrasion resistance.

Means for Solving the Problems The present invention forms a developing device for developing and fixing electrostatic recording paper on which a latent image is formed by an electrostatic recording head by a rigid member and a liquid formed on the developing device. The toner circulation groove and the fixing groove for adsorbing the residual toner formed adjacent to the liquid toner circulation groove are chamfered at their respective edge portions.

According to the present invention, when the electrostatic recording paper on which a latent image is formed by the electrostatic recording head comes into contact with the developing device and passes through the liquid toner circulating groove formed in the developing device, the present invention has the above-described structure. By chamfering the edge portion, the contact area with the liquid toner is increased, so that the developing efficiency can be improved, and the developing device is formed of a rigid member and By chamfering the edges of the formed liquid toner circulation groove and the fixing groove for sucking residual toner, the friction coefficient when the electrostatic recording paper and the developing device come into contact with each other is reduced, and It becomes possible to improve wear resistance.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of a liquid developing apparatus according to an embodiment of the present invention, which is an electrostatic recording head 12 for forming a latent image on a roll-shaped electrostatic recording paper 11 and the electrostatic recording. A developing device 13 for developing the electrostatic recording paper 11 on which the latent image is formed by the head 12 with liquid toner and further removing the residual toner to fix the toner.
And a pair of drive rollers for carrying the electrostatic recording paper 11.
It is composed of 14 and a pinch roller 15. As shown in FIGS. 2 and 3, the developing device 13 is formed of a rigid member such as stainless steel, and has three rows of liquid toner circulation grooves 16 along the front side paper width direction. Adjacent to the liquid toner circulation groove, a fixing groove for sucking residual toner in two rows is formed, and chamfered portions 16a and 17a are provided at the edge portions of both grooves 16 and 17, respectively. There is.

The operation of the liquid developing apparatus of the present invention constructed as above will be described below.

A latent image is formed on the electrostatic recording paper 11 by the electrostatic recording head 12 while the electrostatic recording paper 11 is being conveyed by the driving roller 14 and the pinch roller 15. Next, electrostatic recording paper 11
However, when it is conveyed while being pressed against the developing device 13,
Three rows of liquid toner circulation grooves 16 in which liquid toner is circulated
Development is carried out in contact with. Moreover, the three rows of the liquid toner circulation grooves 16 are provided with chamfered portions 16a at their respective edge portions, and the chamfered portions 16a are provided, whereby the electrostatic recording paper 11 and liquid Since the contact area with the toner is increased, the development efficiency can be improved and a stable image output can be obtained. Further, the chamfered portions 16a, 16a are respectively formed at the edge portions of the three rows of liquid toner circulation grooves 16 and the two rows of fixing grooves 17 formed in the developing device 13, respectively.
By applying 17a, the friction coefficient at the time of contact between the electrostatic recording paper 11 passing over the developing device 13 and the surface between the grooves 16 and 17 is lowered, and further, the developing device 13 itself is made of stainless steel or the like. Since it is formed of a rigid member, the wear resistance of the developing device 13 can be improved. Then, the electrostatic recording paper 11 that has undergone the developing and fixing processes described above is cut into a predetermined size by a cutting device (not shown), and is discharged onto the tray.

As is apparent from the above description, according to the present invention, the developing device for developing and fixing the electrostatic recording paper on which the latent image is formed by the electrostatic recording head is formed by the rigid member and the developing device is formed. A latent image is formed by chamfering the edges of the liquid toner circulation groove formed in the container and the fixing groove for adsorbing the residual toner formed adjacent to the liquid toner circulation groove. By increasing the contact area between the electrostatic recording paper and the liquid toner circulation groove that has been chamfered on the edge formed on the developing device, the developing efficiency can be improved without changing the shape of the developing device. In addition to being able to perform, chamfering is applied to each edge portion of the liquid toner circulation groove and the fixing groove formed in the developing device made of a rigid member to reduce the friction coefficient with the electrostatic recording paper, Improves wear resistance of the developing device It has the effect that it can be improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a liquid developing apparatus showing an embodiment of the present invention, FIG. 2 is a perspective view showing the developing device in FIG. 1, and FIG. 3 is formed in the developing device in FIG. FIG. 4 is a sectional view showing a contact state between a liquid toner circulation groove that has been chamfered and an electrostatic recording paper, FIG. 4 is a schematic configuration diagram showing a conventional liquid developing device, and FIG. 5 is a developing device in FIG. FIG. 6 is a cross-sectional view showing a contact state between the liquid toner circulation groove formed on the disk and the electrostatic recording paper. 11 …… electrostatic recording paper, 12 …… electrostatic recording head, 13 …… developing device, 16 …… liquid circulation groove, 16a …… chamfering processing part, 17 ……
Fixing groove, 17a ... Chamfer processing section.

Claims (1)

[Scope of utility model registration request] 1. A developing device for developing and fixing electrostatic recording paper on which a latent image is formed by an electrostatic recording head is formed by a rigid member, and a liquid toner circulation groove formed in the developing device and the liquid toner circulation groove are formed. A liquid developing device characterized in that chamfering processing is applied to an edge portion of each of a fixing groove for adsorbing residual toner formed adjacent to the liquid toner circulation groove.